The Chip

The Duron 850 remains unchanged from the past five Duron processor releases
that we have seen. The Socket-A processor is still given the benefit of the
Athlon's 100MHz DDR EV6 FSB that offers bandwidth equivalent to that of a 200MHz
bus.

Combining a high bandwidth FSB that keeps the processor fed healthily with
a very large L1 data cache (64KB data/64KB instruction) and a sizeable L2 cache (64KB), the Duron
offers approximately 90% of the performance of the Athlon in most cases.

Currently all Durons are manufactured in AMD's Fab25 plant in Austin, Texas,
using aluminum interconnects. While the old trick of simply looking at the
polishing used on the processor's die used to tell us whether an AMD CPU was
produced at Fab25 or Fab30 in Dresden, variations in the polishing dyes have
degraded the usefulness of that method. The one thing to keep in mind though
is that currently no Durons, regardless of the shade of the polishing dye used
on the processor, are manufactured using copper interconnects. The first Durons
to come out of Fab30 in Dresden may end up being the upcoming parts based on
the Morgan core, however depending on how quickly AMD needs to ramp the clock
speed of the Duron this may not hold true.

In comparison to the Celeron, we have illustrated time and time again that
the Duron is the faster solution on a clock for clock basis. When combined
with a UMA (unified memory architecture) platform (e.g. SiS 730S, VIA KM133)
the Duron's performance lead over the Celeron is cut significantly. A major
reason behind this is that the Celeron's most popular UMA platform is the i810E,
which is definitely much more mature than both of the Duron's UMA platforms.

We have already compared the Duron to the Celeron on their respective UMA platforms;
for a clock for clock comparison read our Celeron
800 Review.

As an overclocker, the Duron 850 is no better and no worse than the Duron 800.
We have seen reports around the web of users hitting up to 1.2GHz with their
Duron 800s, however the 950MHz - 1.1GHz range is more realistic for the average
overclock with a processor like the Duron 850.